Cellar-door hinge.



J. DB ROSE.

CELLAR DOOR HINGE.

APPLIOATION FILED 1211.27, 1911.

Patented May 23, 1911.

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CELLAR-DOOR HINGE.

Specification of Letters Patent.

Application filed February 27, 1911.

Patented May 23, 1911. Serial No. 611,093.

To all whom it may concern:

Be it known that I, J OSEPH DE Rose, a citizen of the United States,residing at Paterson, in the county of Passaic and State of New Jersey,have invented certain new and useful Improvements in Cellar-Door-Hinges, of which the following is a specification.

The present invention embodies a special form of hinge for cellar doors,hatchway doors, or the like.

In carrying out the invention, the hinglng means for the door comprisesa special form of arm having a floating pivot whereby when the door isopened and closed, it moves not only pivotally but receives a bodilymovement independent of such pivotal movement.

The invention resides in the special form of a floating pivotconstituting an element of the hinge and not only performing itsfunction as a pivotal member but forming an anti-friction bearingoperating in an advantageous way.

For a full understanding of the present invention, reference is to behad to the following description and to the accompanying drawings, inwhich- Figure 1 is a sectional view showing a pair of cellar doorshinged by means comprising the invention; Fig. 2 is an end view of thebox which receives the arm of the door and-in which is mounted therolling pivot; Fig. 3 is a section taken about on the line 3-3 of Fig.1, looking outwardly; Fig. 4 is a fragmentary plan view of one of thehinge devices; Fig. 5 is a sectional view showing the position of theparts of the hinge when the cover is upraised.

Specifically describing the invention, including its advantages andpeculiar operation, in the drawings, 1 denotes an ordinary metal cellardoor such as commonly used at the present time, and which is secured inany substantial manner to the hinge arms 2. The arms 2 comprise shanksdirectly fastened to the door 1 and curved extensions 3 adapted toproject into boxes 4, said boxes being arranged at one side of thedoorway or shaft, which is closed by means of one or more of thedoors 1. Each box 4 is closed on all sides except that facing the hingemember 2, the latter side being open to permit movement of the curvedextension 3 of said arm 2.

The extension 3 of the hinge arm 2 is formed at its free end with atoothed segment 3, the teeth of which mesh with teeth 5 formed on theunder side of the top of the box 4. A pivotal connection is establishedbetween the arm 2 and the box 4 by means of a loose pivot 6 which passesthrough the free end of the extension 3 and has its ends arranged tooperate in elongated guides 7 in iegrally formed in the opposite sidesof the The outer or pivoted edge portion of the door 1 is extendedbeyond the adjacent side of the box or boxes 4 so as to overlap the topof the latter, as shown most clearly in Fig. 1, preventing foreignmatter, etc., from entering the hatch or cellar-way between the swingingedge portions of the doors and the walls of the opening normally closedthereby.

In practical operation, it will be apparent that when the door 1 israised to open the same, a pivotal movement of the part 3 will becaused, by reason of the provision of the pivot member 6. Since thesegment 3 is in mesh with the teeth 5, however, the pivotal movement ofthe door causes a floating movement of the pivot member 6, or in otherwords, the pivot 6 is shifted in the bearings or guides 7 of the box,simultaneously with the movement of the door, either upwardly ordownwardly. When so shifted, it will be apparent that by reason of thefact that the pivot 6 is loose on the extension 3, said pivot is adaptedto roll in raising or lowering the door 1, under which conditions itforms an anti-friction bearing, increasing the ease with which the doormay be operated and necessarily reducing friction between the parts to aminimum.

The shifting of the pivotal axis of the door 1 in raising the samepermits the door to remain in an open position, as shown in Fig. 5.Small plugs 8 are detachably mounted on the outer walls of the guide 7and permit of insertion therethrough of the rolling pivot 6, in the mentof the parts.

Having thus described my invention, what is claimed as new is:

1. In combination with a cellar door, or the like, a hinge devicetherefor comprising a box provided at opposite sides thereof with guidebearings, and formed with teeth adjacent to said bearings, and a hingearm projecting from the door and terminating in an extension projectinginto the box and preliminary adj ustformed with a toothed segment at itsfree end arranged in mesh with the teeth of the box, and a loose'rolling pivot passing through the outer end portion of the extension ofthe arm, and having its ends mounted in the guide bearings of the box,whereby when the door is opened, said pivot is shiftable lengthwise ofthe bearings by rolling contact therewith.

2. In combination with a cellar door, or the like, hinging means forsaid door comprising a box adjacent to the outer edge of the door andclosed on all sides except that adjacent to said door, the top of thebox being provided on its under side with a plurality of teeth, and thesides of the box being provided'with elongated guide bearings, and ahinge member comprising an arm secured to the door and having adownwardly and upwardly curved extension projecting into the box andformed at its terminal with a toothed segment in mesh with the teeth atthe top of the box, and a pivot passing loosely through the outer endportion of the extension of the arm and having its ends mounted in theguide bearings of the box for rolling contact therewith, whereby thepivot may be shifted longitudinally of the hearings on raising andlowering of the door.

In testimony whereof I affix my signature witnesses.

in presence of two JOSEPH DE ROSE.

Witnesses: I

J orm Keys,

JOHN RANEEIR.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. 0.

